cryptic

Hi there, thanks for taking a look at my build thread, your comments and suggestions are welcome. I studied biology and design (long story) and the last aquarium I built was a reef Berlin style system with a lot of DIY parts, including a HQI parking flood light, bare T5 balasts and the ensuite...

I've been doing some research on using cryptic zones in place of a skimmer and I'm curious how nutrient export actually happens. Obviously, with a skimmer we physically dump the waste down the drain. With a cryptic zone, sponges and other critters eat the dissolved organics, but nothing is...